Weighing-scale.



2 sums-SHEET 1.

A. DB VILBISS, JR. WEIGHING SCALE.

APPLICATION FILED JUNE 21, 1907.

- Patented Nov. 7, 1911.

A. DE VILBISS, JR.

WEIGHING SCALE. APPLICATION #111111) win-321, 1907.

Patented NOV. '2, 191

2 SHEETS SHEET 2.

UNITED STATSQPATENT OFFICE.

ALLEN DE VILBISS, JIEL, OF TOLEDO, OH IO, ASSIGNUB TD TOLEDO COMPUTINGSCAIiE COMPANY, OF NEWARK, NEW JERSEY, A CORPORATION OF NEW JERSEY.

WEIGHING-SGALE.

Specification of Letters Patent.

Patented Nov. 7, 1911.

articles and the invention aims to provide a construction which can becontained in a limited space and which is extremely sensitive so as topermit accurate weighing of small quantities. v

.g-I't is also an object to arrange the scalepan or platformconveniently at one side of the weighing and indicating apparatus.

:To these ends the invention consistsin certain novel featuresofconstruction and combinations of parts the. essential elements ofwhich are recited in the appended claims and a preferred form ofembodiment of which is described in detail hereinafter and fullyillustrated in the accompanying drawings.

(it said drawings Figure l l'Q'flHftStllt'S the scales in frontelevation; Fig. 2 represents the scales in left side elevation with thecasing broken away and some parts omitted and in sectionon line Q-2 ofFig. 1; Fig. 3 is a vertical longitudinal section taken substantially onthe line 3-3 of Fig. 2; Fig. i is a fragmentary bottom plan view; andFig. 5 is a central vertical cross section of the upper part of theinterior mechanism.

Upon a hollow base 2 there is erected astandard 3 composed of twoupright members and a connecting base. portion. The upper ends of theseuprights are equipped with bearings for a walking beam i preferablyformed as a frame comprising parallel side-arms and cross-pieces andcentral and end cross-rods 5 and (i. The cross-rod 5 constitutes asupport fora pendulum comprising a rodor stem 7 secured to saidcross-rod 5 and a weight 8 depending between the uprights of thestandard 3. The

cross-bars of the frame 4 have depending lips'9 tapped to receive screws10 for adjusting the pendulum, said screws bearing against oppositesides of the latters stem 7 as clearly shown in Fig. 3. The cr0ss-rod 5not only constitutes a support for the porn dulum but supplies knifeedge trunnions 11 as shown in Fig. 5 for engagement with the is secureda pointer 21.

are in use the pendulum will have no move:

ment relatively to the walking beam, the screws 10 being adjusted toprevent any such movement. Thus the pendulum .and the walking beam willrock as one integral structure upon the bearings which the knife edges11 engage as already described.

The end cross-rods '6 of the walking beam irame have projecting knifeedges as indirated by dotted lines in Fig. 1, these edges being upturnedtor the engagement therewith of hearings in arms 12 and 13 of yoke formas shown in Fig. 2. These arms have portions extending over thecross-rods, 6 :0 from end to end thereof as shown in Fig. 2, the sidesof the yokes being preferably united also below said cross-rods. Fromthe lower end of eachyoke there depends a stem H through a suitable slotin the hollow base 2. Withinthe latter there depends a fixed post 15centrally located. with reference to the yoke stems 14 and the latterare con nected by links 16 of equal length to said fixed post 15 asclearly shown in Fig. 3. The latter is in vertical alinement with theaxis of the walking beam at and it, will'be perceived that. aparallelogram construction is provided by the above-described parts.

While two separate links 16 are shownit sutiiceas of course the twolinks always re main in line.

A strap 18 secured across the top ofthe walking beam frame, preferablyby screws 13 entering the portions of said frame which surround thecentral cross-rod 5, has a downturned front portion 20 to which thereThe top of the hollow base 2 is'slotted as shown at 22 in Fig. 2 for thepassage of said pointer. The latter has a terminal portion .23 extendingat an angle to its main portion and overlying a table 24 of weightgraduations. This table is arranged upon a plate 25 suitably supportedwithin the hollow base 2 behind a longitudinal sight-opening 26 therein.The plate 25 is'curved in' t-hearc of a circle to accommodate the sweepof the bent end of the pointer and is likewise inclined so as to showclearly through the sight opening. .The latter is preferably sur roundedby a frame 27 which confines the glass 28 in place.

As here shown the table of weight graduations runs from right to leftand consequently when the scales are normal the pointer is swung to theright as shown in Fig. 1. This pointer extends at right angles to thewalking beam 4 so that normally the latter is at an inclination but thependulum hangs straight down being properly adjusted by screws 10. Itwill thus be apparcut that when weighing an article the righthandportion of the parallelogram structure heretofore described must bedepressed and the left-hand portion correspondingly elevated.

To the depending stem of theyokc 12 there is secured within the hollowbase 2 a horizontally extending arm 30 which projects away from theparallelogram structure and at its extremity supports an upright rod orstem 31, the latter projecting through a slot in the top of the. hollowbase 2 and carrying above it curved branching arms 32 designed tosupport a scale-pan 33. It will be seen that the weight of anythingplaced in this scale-pan will thus tend to depress the right-handportion of the parallelogram structure.

In order to counterlmlance normal weight on the right-hand side of theaxis ,of the walking beam}: including the weight of the scale-pan andits immediate support, a weight 34 is mounted in the yoke 13 and aweight 35 is secured to the stem 14 of said yoke. In order toindividually counterbalance the scale-pan and its support in the matterofleverage due to the mounting of the scale-panon the extremity of thehorizontally projecting arm 30 and consequent tendency to thrust thestem 14 of the yoke 19 to the left. a pair of diverging arms 36 aresecured by a suitable boss 37 to said yoke'stem and weights are mountedupon 7 the outer ends of said arms.

In order to steady the moven'lents of the parts in weighing and preventundue vibration of the pointer 21 a dash-pot is employed whose cylinder40 is fixedly secured in a bracket 41 projecting from the standard 3 asshown in Fig. 3. the said cylinder being preferably screw-threadcd toengage a tapped opening in said bracket. The piston rod l? of thedash-pot is connected through a knuckle joint 43 with the lowercross-bar of the yoke 12.

The weighing apparatus above the hollow base 2 is preferably inclosed ina glass casingfiO and the scale-pan 33 is closely adjacent to thiscasing thus giving it a convenient location and keeping the scalescompact.

What is claimed is: t,

l. A scale comprising a. hollow base. a working beam mounted thereon, anarm dopendiugr from the working beam and connected by links to astationary part beneath the base. a lateral nroiection on one of thearms within the base, a support for a scale pan on said projection, andmeans for counterbalancing the projection and scale pan also mountedupon said arm.

:2. In'we'ighing scales, the combination of an overhead beam,load-,oounterbalancing means connected with said beam, indicating meansconnected with said beam, an arm suspended from the outer end of thebeam, :1 link jointed at one end to the lower end of said arm, a fixedsupport for the link, a scale: pan orplatform supported by said armlaterally removed therefrom, and an individual counterbalance for saidscale-pan.

3. In weighing scales, the combination of an overhead beam,load-counterbalancing means connected with said beam, indicating meansconnected with said beam, an arm.

counterbalancing the arm, link and seale pan, and means for individuallycounterbalancing the-scale'pan.

4. In weighing scales, the combination of a walking beam,load-counterbalancing means connected with said beam, a pointer carriedby said beam, arms suspended from opposite ends of the beam, at fixedcentral support to which said arms are linked at their lower ends. ascale-pan or plat-form carried .by one of said arms to one side of. theparallelogram structure of which it forms a part. and an individualcounterbalance for said scale-pan. V

5. In weighing scales, the combination ofa walking beam,load-cotmterbalancing means connected with said beam, a pointer carriedby said beam, arms suspended from opposite ends of the. beam, a fixedcentral support to which said arms are linked at their lower ends, ascale-pan or platform carried by one of said arms to one side of theparallelogram structure-of which it forms a part, a counterbalancingweight carried by the other arm, and an individual counterbalance forthe scale-pan. t

6. In weighing scales, the combination of a walking beam, a pendulumsuspended centrally therefrom, a pointer carried by said beam, armssuspended from opposite ends of the ,beam, a fixed central support towhich said arms are linked at their lower ends, a scale-pan or platformcarried by one of said arms to one side of the parallelogram structureof which it forms a part, and a dash-pot connected with that arm.-

7. In weighing scales, the combination of a walking beam, a pendulumsuspended centrally therefrom. a pointer carried by said beam, armssuspended from opposite ends of the. beam, a fixed central support towhich said arms are linked at their lower ends. a

lateral projection on one of said arms, a scale-panor platform mountedon said lateral projection, a counterbalancing 'weight carried by-theother of said arms, anda weighted lateral projection on the first specified arm extending oppositely to the projection which carries thescale-pan.

8. In weighing scales, thecombination of a duplex standard, a walkingbeam fulcrumed between the upper ends of the members of said standard, adepending pointer carried by the middle portion of said beam,

a support having a table of Weight gradua-' tions over which saidpointer extends, yoke- 5 form arms suspended from opposite ends of thebeam and having downward extensions,

:1 fixed central supp0rt t0 which the latter,

are linked, a pendulum suspended from the :middle of the beam, a lateralproj'eetion on vone of the arms, a scale-pan or platform mounted on saidprojection, a dash-pot the cylinder of which is fixedly supported withinthe yoke-form portion of said arm and the piston'rod of which isconnected with 5 the latter, a counterbalancing Weight carried bytheother arm, and a lateral projection on the first specified arm,extending oppositely to the projection which carries the scale-pan andweighted to counterbalance so the latter.

9. In a Weighing scale, a frame, a beam pivotally mounted in the frameand carrying-knife edges at its opposite ends, yoke arms depending fromthe knife edges, links knife edges, links connecting the arms at thelower ends to the frame, a bracketprojecting from the frame within oneof the yokes, a dash-pot supported by the bracket,

a piston within the dash-pot and connected;

to the; adjacent depending arm, a goods receiver connected to one of thearms, an invariable counterbalance connected to the other, and apendulum rigidly connected to the beam. t

11. In a weighing scale, a frame comprising the supports 3, a cross rodhaving knife edges resting on the supports, a pendulum connected to thecross rod, a scale beam mounted upon the cross rod and angularlyadjustable with relation thereto and to the pendulum, means foradjusting the vbeam with relation to the cross rod and the pendulum anda g'oods receiver connected tothe beam.

. ALLEN DE VILBISS', JR.

Witnesses: M. L.'THoMPsoN,

' E, E. LooMIs.

